Presystolic atriogenic mitral reflux developed at abnormally long PR intervals.
D000818:Animals; D016275:Atrial Function; D002302:Cardiac Output; D003720:Densitometry; D004285:Dogs; D004558:Electric Stimulation; D004562:Electrocardiography; D006329:Heart Conduction System / Q000502:physiology; D006339:Heart Rate; D008944:Mitral Valve Insufficiency; D013997:Time Factors; D016276:Ventricular Function